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BS EN 489-2009 区域供暖管道.直埋式热水管网用预先绝热有包覆管层的管道系统.聚氨基甲酸乙酯热绝缘和聚乙烯外覆层的钢管用.pdf

Thejointcasingshallbetightagainstexternalwa

BSEN489:2009 EN489:2009(E)

4.2.1Water tightness

投标用--生活污水收集管道完善工程一常福街道东山路、深圳路污水主管网工程施工组织设计.docx4.2.2Soil stress test

4.2.3.2Cell structure

Theaveragesizeof thecellsinaradialdirectionshallbeless than0,5mm,determinedinaccordancewith5.4.5.1. The closed cell content determined in accordance with 5.4.5.2 shall be not less than 88 %.

Theaveragesizeof thecellsinaradialdirectionshallbelessthan0,5mm,determined inaccordancewith5.4.5.1. Theclo sedcellcontehtdetermllhedinac

4.2.3.3Foamdensity

e densityof thefoamat anypositionshallbenot less than 60kg/mwhenmeasured in accordance specimenmayhaveadensitybelow60kg/m?

Whentestedinaccordancewith5.4.7,thewaterabsorptionafter90minof immersioninb exceed10%oftheoriginalvolume.

4.2.4Weldjointstresscrackresistance

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4.3Installationinstructions

4.3.1Genera

BSEN489:2009 EN489:2009(E）

4.3.2Work environm

edurestoobtainoptimumworkconditionsonsite

4.3.3 Cleaning

erproceduresforthecleaninganddryingshallbe

steelpipesurfaces; insulationsurfaces; jointcasingsurfaces; casingsurfaces Thesentence"Anywetfoamshallberemovedfrom thepipeends"shallbeincludedin theinstructions.

steelpipesurfaces; insulation surfaces; joint casing surfaces; casing surfaces. Thesentence"Anywetfoa

4.3.4Surveillancesystem

Whenmeasuringelementsforasurveillancesystemisinstalledinthejoint,properproceduresfd surveillance system shallbe specifiedbefore the assembly takes place.This specification shall 14419andincludeproceduresfor:

assemblywork injoints toensurethefunctionof thesystem; assemblycheckof the surveillance system duringconstruction; testafterfinishingameasuringsection.

4.3.5Steelsiteweld

Properproceduresfor thesteelweldshallbedescribed.This descriptionshall,asaminimum, "Weldingprocess"and"Preparationforweldingandliningup"inaccordancewithAnnexA.

4.3.6Joint casing

4.3.7Joint insulation

Properproceduresforonsitefoamingofjointsorinstallationofprefabricatedjointinsulationshallbedescribed Thefollowingproceduresfor onsitefoaming ofjointsshall,asaminimum,bedescribed:

BSEN489:2009 EN489:2009(E)

5.1Soilstresstest

The soil stress test shall be carried out as follows

BSEN489:2009 EN489:2009(E）

Dimensions in millimetres

Figure1—Minimumdimensionsofsandbox

BSEN489:2009 EN489:2009(E)

Figure2—Standardsandquality

Threetestspecimensofminimumlength2,5mwithajointcasinginthemiddleshallbeused.

5.1.4Sandbox test

Thefollowingtestparametersshallbeused: servicepipe temperature of(120± 2)°Cmaintained for 24 hbefore the testing; simulated sand overfill of 1 m (18 kN/m² effective vertical soils stress); displacementof75mm; forwardspeedof10mm/min; backwardspeedof50mm/min; 100cycles,whereacycleisdefinedasoneforwardandonebackwardmovem

5.2Waterimpermeabilitytest

BSEN489:2009 EN489:2009(E）

SamplesshallbetestedaccordingtoClause5.2.4inEN253:2009 Thetestsamplesshallbecutperpendiculartotheweldseam Thesampleshallcoverthewholelengthofweldseamplusatleast20mmparallellengthbetweenthedumbbel shouldersandtheoutsideoftheweldedareainbothends Asa deviation to thetestmethod in5.2.4of EN 253:2009,nonotchshallbecut in thesample. NoTETheweldseamisconsideredtobethenotch Samplesofoverlapweldsshallbeprotectedfromexcessivebendingforces.Measuresshallbetakeninthedesign oftheclampingdevicetopreventthis. Incasethematerialthicknessofcasingandjointcasingdiffer,thetensilestressshallbecalculatedbaseduponthe Smallerthickness.

5.4.1 General

Thetypetestsforpolyurethanerigidfoaminsulation(PUR)forjointsshallbecarriedoutinaccorc EN253:2009,withtheadditionsgivenin5.4.2to5.4.7

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BSEN489:2009 EN489:2009(E)

Dimensions in millimetres

Dimensionsinmillimetres

Figure3 Specimensfortestingageingresistanceofjointfoam

5.4.3Sampling

5.4.4Ageingresistance

TwojointsshallbepositionedinaccordancewithFigure3

Thepipeandjointspecimenshallbeagedbymaintainingtheservicepipeatatemperature hours,or alternatively at atemperatureof 170°℃ for 1450hours,while the casingpipe temperature.

temperature shallbe recorded continuously during the aging period and shall not deviate more than O,5 °C from the requiredtemperature. Aftercoolingtoroomtemperature,thejointsshallbeopenedforinspection

After cooling toroomtemperaturethejointsshallbeopenedforinspection

5.4.5 Cell structure

5.4.5.1 Cell size

富县城市生活污水处理工程施工组织设计of thecells shallbedeterminedoveralengthof10mmmeasured inaradial directionwiththe ce nmeasurementcoincidingwiththecentrepointoftheappliedinsulation. of thecellsshallbethequotientofthetestlengthand thenumberofcellscountedalong theradia 1selected andshallbedetermined as an averagevalueof measurementson3specimens.

5.4.5.2Closed cellconten

Theratioof open toclosed cells shallbe determined in accordancewith EN ISO4590:2003(method 1). Deviatingfrom theproceduredescribed in EN ISO4590 the test specimen shall be a cube with an edge of 25 mm. If this size of cube cannot be cut from the insulation in accordancewith5.4.5.1,the dimensions shall be 25 mmx 25mmxt,wheretisthemaximumradialthickness.

5.4.6Foamdensity

ThedensityshallbemeasuredinaccordancewithENISO845

ThedensityshallbemeasuredinaccordancewithENISO845.

SJ／T 1542-2020 电真空器件用镍及镍合金化学分析方法.pdfBSEN489:2009 EN489:2009（E)

Test specimens shall be takenfrom the centre of the foam in sets of three in accordance with Clause 5.1.2.5.of EN 253:2009.Each testspecimen shallbe30 mmx30 mmxtwheretis the maximum obtainable thicknessbut not exceeding 30mm.Alternatively,test specimens shall be cylindrical,30mm long in the axial direction of thepipe andofdiameterdwheredisthemaximumobtainablediameterbutnotexceeding30mm.